O objetivo do presente trabalho consiste em estudar o comportamento térmico das panelas durante as etapas do ciclo operacional utilizando modelos de transferência de calor e simulação computacional. A partir dos resultados do estudo se procurou fazer modificações com o intuito de diminuir as perdas de energia calorífica durante as etapas do processo produtivo. Através da modelagem matemática, medições na planta e simulações computacionais foram determinadas as quedas de temperatura e perdas de calor das panelas. A partir daí foram propostas mudanças operacionais e físicas que após testes práticos e ou simulações computacionais se mostraram eficientes para a diminuição das perdas caloríficas e menor consumo de energia elétrica no forno-panela. Palavras-chave: Panela de aciaria; Simulação computacional; Controle da temperatura em panelas; Ciclo operacional de panelas.
0,05). Os escores da escala de Ramsay não diferiram entre os tipos de opioides utilizados no intraoperatório (p>0,05). CONCLUSÃO: O único fator independentemente associado à dor na sala de recuperação pós-anestésica foi o tipo de opioide utilizado na indução anestésica. A dor pós-operatória ainda é um evento frequente que acomete a maioria dos pacientes e protocolos de analgesia precisam ser implementados para minimizar os efeitos que a dor subtratada pode causar.]]>
BACKGROUND AND OBJECTIVES: Compare anesthesia techniques with sufentanil and intraoperative infusion of remifentanil or dexmedetomidine, and to then analyze their associations with the incidence of pain and other complications in the post-anesthesia care unit. METHODS: A retrospective analytical observational study conducted in a reference center for bariatric surgery in São Paulo, São Paulo State, Brazil. Patients (n=120) included in the study were randomly selected using this site's anesthesia records for bariatric surgery. Four 30-patient groups were established: G1-induction with 0.5 µg.kg-1 sufentanil associated with the continuous infusion of remifentanil; G2-induction with 0.7 µg.kg-1 sufentanil associated with the continuous infusion of remifentanil; G3-induction with 0.5 µg.kg-1 sufentanil associated with the continuous infusion of dexmedetomidine; and G4-induction with 0.7 µg.kg-1 sufentanil associated with the continuous infusion of dexmedetomidine. Significance was set at p<0.05. RESULTS: The incidence of pain in the post-anesthesia care unit was 52.5% (n=63). It was considered intense in 36.11% of these cases. The incidence of pain in the post-anesthesia care unit was lower in patients receiving a continuous infusion of dexmedetomidine relative to those who received remifentanil infusion. Sufentanil dosage in anesthesia induction did not influence the incidence of pain (G1=G2>G3=G4; p<0.05). The occurrence of respiratory complications did not differ significantly between the groups. CONCLUSION: The use of dexmedetomidine proved to be better for analgesia in the post-anesthesia care unit, and it did not increase the risk of respiratory complications when compared to the continuous infusion of remifentanil, regardless of the sufentanil dose used for induction.
The hand of the human being is essential for carrying out several daily tasks. Its movement and precision in movements make it possible to manipulate objects, as well as perform complex functions that require high precision and control, such as in surgeries. Despite the great functionality of the hands, there are some diseases and traumas that cause people to lose part of their functionality, in the sense of reducing their motor skills and/or decreasing the effectiveness of the aforementioned functions. The research project is intended to develop a robotic mechanism of the exoskeleton type, involving a glove that will help people who have diseases that affect the motor actions of the hands in the treatment of diseases or traumas. Through this mechanism, physiotherapists will be able to help patients with these pathologies to carry out physical therapy activities and, consequently, these patients will be able to carry out activities of daily living with less difficulty. For the operation of the robotic mechanism, a robotic orthosis in the shape of a glove will be developed, controlled by the action of an instrumented glove. Up to the present moment of execution of the project, project drawings are being executed through CAD software, the manufacture of the exoskeleton parts of the actuation glove and for a test bench and Arduino programming for receiving signals from the control glove and the transformation of these signals to exoskeleton movement.
Resumo O cenário tecnológico brasileiro passa por transformações profundas, a indústria em geral faz parte desse panorama, dentro dos segmentos indústrias temos a automobilística, onde novas tecnologias são apresentadas e as demais aprimoradas, nesse segmento temos as ligas não ferrosas de alumínio, que com adição de elementos de liga se transformam em ligas de alta performance, assim como as ligas de aços. Elementos de maquinas de ligas de alumínio sofrem modificações em suas propriedades mecânicas com a variação de temperaturas, deformação, composição química entre outras. O presente trabalho objetiva a comparação das propriedades mecânicas dos resultados experimentais da liga Al-0,05%Cu-[0,35-0,45] %Fe-0,22%Zr e de simulações computacionais de chapas para aplicação na indústria automotiva. A liga foi obtida a partir do Al-EC modificado por inserções de ferro na faixa de [0,35-0,45] % e 0,22%Zr. Posteriormente, após a solidificação da liga em molde unidirecional horizontal, os lingotes foram transformados em perfis de 3,0mm e submetidos a ensaios mecânico de tração. Na parte de simulação computacional as propriedades mecânicas foram medidas usando chapas finas de aço e chapas mas espessas de alumínio, as propriedades obtidas nos ensaios reais, foram utilizadas como paramentos das simulações das chapas de alumínio, objetivamente a comparação das propriedades mecânicas com os resultados experimentais da liga estuda. Os resultados dessas análises permitem avaliar que a liga Al-0,05%Cu-[0,35-0,45] %Fe-0,22%Zr pode ser aplicada em componentes estruturais na indústria automotiva que trabalharem estaticamente na forma de fuselagem de automóveis de passeio ou veículos de trabalho com boas propriedades mecânicas. Palavras-chave: Liga Al-Zr; Tratamento térmico; Propriedades mecânicas; Simulação computacional. STUDY OF THE EFFECT OF DEFORMABILITY IN THE LEAGUE Al-0.05% Cu-[0.35-0.45] % Fe-0.22% Zr IN PLATE FORMAT Abstract The Brazilian technological scene undergoes profound transformations, the industry in general is part of this panorama, within the segments industries we have the automobile, where new technologies are presented and the other improved, in this segment we have the non ferrous aluminum alloys, which with addition of Alloy elements are transformed into high-performance alloys, as are steel alloys. Elements of aluminum alloys undergo changes in their mechanical properties with varying temperatures, deformation, chemical composition, among others. The present work aims at comparing the mechanical properties of the Al-0.05% Cu-[0.35-0.45] % Fe-0.22% Zr alloy experimental results and computational plate simulations for application in the automotive industry. The alloy was obtained from Al-EC modified by iron insertions in the range of [0.35-0.45] % and 0.22% Zr. Subsequently, after solidification of the alloy in a horizontal unidirectional mold, the ingots were transformed into profiles of 3.0mm and subjected to mechanical tensile tests. In the computational simulation part the mechanical properties were measur...
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